Vice Professor XU Ya and his team research the distribution of igneous rocks in Huanghua depression based on the reduction to pole (RTP) magnetic anomaly and its derivative processing results.

Based on the RTP anomaly and the derivative results, three types of igneous rock distribution areas are predicted in Huanghua depression. The large scale igneous rocks are mainly distributed in the north part of Huanghua depression. The string bead-shaped igneous rocks are mainly located in the north and southwest parts. Some craters are located in the middle-south part. The distribution of igneous rocks is controlled by the deep buried fault along the coastal boundary and the associated tertiary faults.

Their study verified the validity of the magnetic derivative methods for the planar distribution study of igneous rocks. The study results of Huanghua depression are the basis of the seismic interpretation of igneous rocks and the tectonic study in this area.

Xu et al. Investigation of igneous rocks in Huanghua depression, North China, from magnetic derivative methods. Journal of Geophysics and Engineering，2011，8(1):74-82 (Download Here)

Figure. Magnetic anomaly and the derivative computation results of the seismic profile.(Image by XU Ya)

Figure. The distribution of igneous rocks in sedimentary basin of the Dagang area.(Image by XU Ya)